Significant strides were made in the early parts of the twentieth century in the formulation of gravity as a classical field theory. Out of that effort came forth General Relativity (GR), which passed almost all the tests thrown at it, starting from the short, terrestrial (or weak gravity region) length scales [1]}, to solar system tests [2]}, to binary pulsar (strong gravity region) tests [2]}, and finally constraints from Gravitational Wave (GW) (extreme gravity region) observations in [4]}.
